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