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