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