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