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