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