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