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