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