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)(11,13)(12,14)(15,16)(17,18,23,20,22,26,21,25)(19,27,31,24,30,28,29,32)(2,3)(9,11,12,15)(10,13,14,16)(17,19,22,30)(18,24,26,32)(20,27,25,28)(21,31,23,29)(10,14)(13,16)(17,18,21,25,22,26,23,20)(19,28,29,24,30,27,31,32)(1,3,4,2)(6,8)(17,20,23,26,22,25,21,18)(19,24,31,28,30,32,29,27)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.