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