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