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