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