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)(13,14,18,19)(15,20,24,28)(16,25,27,21)(17,22,23,26)(5,6)(7,10)(8,9)(11,12)(13,15,18,24)(14,20,19,28)(16,26,27,22)(17,21,23,25)(1,2,3,4)(6,9)(10,11)(13,16,18,27)(14,21,19,25)(15,23,24,17)(20,22,28,26)(5,7,8,12)(6,10,9,11)(13,14,18,19)(15,20,24,28)(16,25,27,21)(17,22,23,26)(13,17)(14,22)(15,16)(18,23)(19,26)(20,25)(21,28)(24,27) 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.