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