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