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