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