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