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