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