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