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