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