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