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