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