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