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