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