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