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