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