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