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