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