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