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)(12,16)(13,14)(17,18,22,24,20,25,21,26)(19,27,28,31,29,23,30,32)(5,6)(7,8)(10,14)(15,16)(17,19,22,28,20,29,21,30)(18,23,24,32,25,27,26,31)(1,2,3,4)(6,8)(9,11,13,12)(10,15,14,16)(18,24)(19,28)(21,22)(23,27)(25,26)(29,30)(9,12,13,11)(10,15,14,16)(18,25)(23,27)(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.