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