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