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