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