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