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