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