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