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