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