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