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