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