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