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