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