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