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