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