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