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