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