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)(17,18,22,24)(19,27,28,23)(20,30,31,29)(21,25,32,26)(1,3,7,4)(2,5,8,6)(9,10)(11,14)(12,13)(15,16)(17,19,22,28)(18,23,24,27)(20,26,31,25)(21,30,32,29)(1,4,7,3)(2,5,8,6)(10,13)(14,15)(17,20,21,23,22,31,32,27)(18,19,26,30,24,28,25,29)(1,5,7,6)(2,3,8,4)(9,11,12,16)(10,14,13,15)(18,24)(19,28)(25,26)(29,30)(1,6,7,5)(2,3,8,4)(17,21,22,32)(18,25,24,26)(19,29,28,30)(20,23,31,27)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.