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