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