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