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