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