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