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