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