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