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