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