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