One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,10)(4,8)(5,14)(6,9)(7,12)(11,15)(13,16)(19,27)(20,21)(23,30)(25,26)(28,29)(31,32) involution — undirected(1,3,4,11,6,13,5,12)(2,7,14,16,9,15,8,10)(17,18)(19,23)(20,25)(21,26)(22,24)(27,30)(28,31)(29,32)(17,19,22,28)(18,23,24,31)(20,27,21,29)(25,30,26,32)(1,2)(3,7)(4,14)(5,8)(6,9)(10,12)(11,16)(13,15)(18,24)(23,31)(25,26)(30,32) involution — undirected(1,4,6,5)(2,8,9,14)(3,11,13,12)(7,10,15,16)(17,20,22,21)(18,25,24,26)(19,27,28,29)(23,30,31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.