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