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