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