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