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