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