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