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