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