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