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