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