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