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