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