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