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