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