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