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