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