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