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