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