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