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