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