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