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