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