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