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