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