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