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