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