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