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