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