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