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