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