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