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