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