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