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