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