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