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