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