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