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