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