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