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