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