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