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