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