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