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