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