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