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