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