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