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