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