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