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