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