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