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