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