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