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