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