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