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