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