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