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