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