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