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