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