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