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