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