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