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