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