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