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