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)(17,18,23,25)(19,26,20,24)(21,27,31,30)(22,29,32,28)(1,3,4,7)(2,5,6,8)(10,13)(11,16)(17,19,23,20)(18,24,25,26)(21,28,31,29)(22,27,32,30)(1,2)(3,5)(4,6)(7,8)(9,11)(10,14)(12,13)(15,16)(18,25)(22,32)(24,26)(27,30) involution — undirected(9,12,15,14)(10,11,13,16)(17,20,23,19)(18,26,25,24)(21,29,31,28)(22,30,32,27)(1,3)(2,5)(4,7)(6,8)(9,13,15,10)(11,12,16,14)(17,21)(18,27)(19,29)(20,28)(22,24)(23,31)(25,30)(26,32)(1,2)(3,5)(4,6)(7,8)(9,14,15,12)(10,16,13,11)(17,22,23,32)(18,28,25,29)(19,27,20,30)(21,24,31,26)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.