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