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