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