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