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