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