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