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