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