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