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