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