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)(11,13)(12,14)(15,16)(18,22)(19,23)(24,28)(25,27)(26,31)(29,32)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,18,21,22)(19,25,27,23)(20,28,30,24)(26,31,29,32)(9,11)(10,13)(12,16)(14,15)(17,19,21,27)(18,23,22,25)(20,29,30,26)(24,32,28,31)(3,8)(6,7)(11,16)(13,15)(17,20)(18,24)(19,26)(21,30)(22,28)(23,31)(25,32)(27,29) involution — undirected(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,18,21,22)(19,25,27,23)(20,28,30,24)(26,31,29,32)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.