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