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