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