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