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)(17,18,19,24,27,31,32,29,21,23,28,30,20,25,26,22)(2,6)(4,11)(7,12)(10,15)(18,22)(19,26)(20,27)(23,29)(24,25)(28,32)(30,31) involution — undirected(1,3)(2,7)(4,10)(5,9)(6,12)(8,14)(11,15)(13,16)(18,23)(22,29)(24,30)(25,31) involution — undirected(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.