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