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