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