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