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