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