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)(15,19)(16,17)(18,20)(21,22,26,28)(23,24,25,27)(1,2,3,4)(13,15)(14,18)(16,19)(17,20)(21,23)(22,27)(24,28)(25,26)(1,2)(3,4)(14,16)(18,19)(21,24,26,27)(22,25,28,23)(5,6)(7,9)(8,10)(11,12)(13,15)(14,19)(16,18)(17,20)(21,25,26,23)(22,24,28,27)(5,7,8,11)(6,9,10,12)(13,16,17,14)(15,19,20,18)(21,24)(22,25)(23,28)(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.