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