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