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