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