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