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