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