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