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)(11,14)(12,13)(15,16)(17,18,21,24)(19,23,20,22)(2,6)(4,7)(9,10,12,13)(11,14,16,15)(19,20)(22,23)(26,29)(30,32)(2,6)(4,7)(10,13)(14,15)(17,19,21,20)(18,22,24,23)(25,26)(27,30)(28,29)(31,32)(1,3,5,8)(2,7,6,4)(9,11,12,16)(10,14,13,15)(17,20,21,19)(18,23,24,22)(1,4,5,7)(2,3,6,8)(9,10)(11,15)(12,13)(14,16)(17,18)(19,22)(20,23)(21,24)(25,27,28,31)(26,30,29,32)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.