The Giants racked up their fourth straight score of 100 or more in Saturday's. 26-point home win over Geelong, with Cadman kicking a career-best six goals - all after halftime.
Four successive wins have taken GWS to seventh spot and they can put more pressure on the other finals aspirants on Thursday at Marvel Stadium if they overcome injury-hit Essendon, who have lost six straight.
GWS on Sunday announced a four-year contract extension for Cadman, tying him to the club until the end of 2030.
The Giants have hit the century points mark nine times this season, the joint second-best with third-placed Adelaide, behind the ninth-ranked Bulldogs.
"When our offence is up and going we feel unstoppable," Cadman told AAP.
"Just bringing that every week, obviously heavily reliant on that midfield group.
"The backs as well, kickstarting our offence and allowing us to get in good shapes and get used."
After kicking just 6.4 from 12 games in his debut season of 2023, the 21-year-old Cadman has become an increasingly influential part of the Giants' forward line.
He appeared in 23 of 25 games last season, kicking 30.11, and has played all 17 matches of this campaign, booting 32.18.
Cadman, the 2022 No.1 draft pick, is one of several threats in a multi-pronged attack featuring three of the season's top 19 goal kickers.
Jesse Hogan, the 2024 Coleman Medallist has 41 and Toby Greene 29.
Jake Riccardi and Callum Brown have both bagged 17 and prize off season recruit Jake Stringer 15, including 12 in his past five games.
"There's been a little bit of talk that we're reliant on Jesse to kick a winning  score and he has big games, but I'm not sure we're necessarily reliant on him," GWS coach Adam Kingsley said after the Geelong game.
Cadman has hit a purple patch over the past month with 16 goals in his four matches, including five against Brisbane.
He started the season with six goals across the Giants' first six games.
"I was struggling a little bit there at the start of the season but it's just slowly built up and just starting to piece the puzzle together now," Cadman said.
"Hopefully I can keep backing this up with a couple of good games and keep my confidence sky high."
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