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