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