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