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