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