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