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