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