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