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