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