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