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