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