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