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