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