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