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