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