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