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