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