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