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