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