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