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