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)(13,14,19,24)(15,20,16,22)(17,23,18,27)(21,26,28,25)(1,2,4,3)(5,7)(6,9)(8,12)(10,11)(13,15,19,16)(14,20,24,22)(17,26,18,25)(21,23,28,27)(1,3,4,2)(13,15,19,16)(14,21,24,28)(17,25,18,26)(20,23,22,27)(7,12)(9,11)(13,16,19,15)(14,22,24,20)(17,25,18,26)(21,27,28,23)(6,10)(9,11)(13,17,19,18)(14,23,24,27)(15,25,16,26)(20,21,22,28)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.