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