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