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