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)(19,25)(20,22)(21,28)(23,27)(24,30)(26,31)(29,32)(3,7)(5,8)(9,10,14,16)(11,13,15,12)(17,19,22,27)(18,23,20,25)(21,29,30,26)(24,32,28,31)(1,2)(3,5)(4,6)(7,8)(9,11,14,15)(10,12,16,13)(18,20)(23,25)(24,28)(31,32)(9,12,14,13)(10,11,16,15)(17,20,22,18)(19,25,27,23)(21,24,30,28)(26,31,29,32)(1,3,4,7)(2,5,6,8)(9,10)(11,12)(13,15)(14,16)(17,21,22,30)(18,24,20,28)(19,26,27,29)(23,31,25,32)(1,2)(3,5)(4,6)(7,8)(9,13,14,12)(10,15,16,11)(17,19)(18,23)(20,25)(21,26)(22,27)(24,31)(28,32)(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.