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