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