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