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