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