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