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