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