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