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