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