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