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