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