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)(13,14,20,24)(15,18,23,19)(16,25,26,21)(17,22,28,27)(1,2,3,4)(13,15,19,14,20,23,18,24)(16,25,17,27,26,21,28,22)(6,9)(10,12)(13,16,20,26)(14,21,24,25)(15,22,23,27)(17,19,28,18)(13,17)(14,22)(15,25)(16,19)(18,26)(20,28)(21,23)(24,27) involution — undirected(5,7,8,11)(6,10,9,12)(13,18,20,19)(14,15,24,23)(16,17,26,28)(21,22,25,27)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.