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