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