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