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