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