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