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