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