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