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