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