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