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