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