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