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