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