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