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