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