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)(15,24)(16,27)(17,22)(18,28)(19,23)(20,26)(21,25)(1,2)(3,4)(5,7,9,8)(6,10,12,11)(13,14)(15,24)(16,27)(17,22)(18,28)(19,23)(20,26)(21,25)(13,15,17,25,19,16,18,26)(14,20,28,27,23,21,22,24)(2,4)(13,16,18,25,19,15,17,26)(14,21,22,27,23,20,28,24)(5,8,9,7)(6,11,12,10)(13,17,19,18)(14,22,23,28)(15,25,16,26)(20,24,21,27)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.