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