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