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