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