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