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