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