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