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