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