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