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