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