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