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