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