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