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