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