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