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