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