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)(19,23)(20,25)(21,24)(22,27)(26,30)(28,32)(29,31) involution — undirected(1,3,5,4)(2,6,8,7)(9,10,14,12)(11,16,13,15)(17,19)(18,23)(20,22)(21,28)(24,32)(25,27)(26,31)(29,30)(1,3,5,4)(2,7,8,6)(9,11,14,13)(10,15,12,16)(18,24)(19,20)(21,30)(23,31)(25,32)(26,27)(1,4,5,3)(2,6,8,7)(9,12,14,10)(11,15,13,16)(17,20,22,19)(18,25,27,23)(21,29,30,28)(24,31,26,32)(9,13,14,11)(10,16,12,15)(19,20)(23,25)(28,29)(31,32)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.