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