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