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