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