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