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