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