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