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