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