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