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