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