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