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