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