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