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