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