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