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)(17,18,21,25,22,26,19,23)(20,24,28,31,29,32,27,30)(1,3,5,4)(2,6,7,8)(9,11,15,13)(10,16,14,12)(17,19,22,21)(18,23,26,25)(20,28,29,27)(24,31,32,30)(1,4,5,3)(2,6,7,8)(9,12,15,16)(10,11,14,13)(18,23)(19,21)(24,30)(25,26)(27,28)(31,32)(9,13,15,11)(10,16,14,12)(17,20,22,29)(18,24,26,32)(19,27,21,28)(23,30,25,31)(9,14,15,10)(11,12,13,16)(20,29)(24,32)(27,28)(30,31)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.