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