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