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