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