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