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