One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10)(11,15)(12,14)(13,16)(17,18)(19,26)(20,22)(21,30)(23,25)(24,28)(27,31)(29,32) involution — undirected(1,2,4,5)(3,6,7,8)(9,11,12,16)(10,13,14,15)(17,19)(18,24)(20,26)(21,29)(22,28)(23,31)(25,32)(27,30)(10,14)(13,15)(17,20,22,18)(19,27,28,32)(21,30,23,25)(24,31,26,29)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(18,20)(24,26)(25,30)(27,32)(2,5)(6,8)(11,16)(13,15)(17,21)(18,25)(19,28)(20,30)(22,23)(27,32) involution — undirectedA 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.