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)(14,19)(15,16)(22,27)(24,25)(5,6)(7,10)(8,9)(11,12)(13,14,17,19)(15,23,16,21)(18,27,26,22)(20,25,28,24)(1,2,3,4)(6,9)(10,11)(13,15)(14,20)(16,17)(18,25)(19,28)(21,22)(23,27)(24,26)(5,7,8,12)(6,10,9,11)(13,16,17,15)(14,21,19,23)(18,25,26,24)(20,27,28,22)(14,22)(18,26)(19,27)(20,21)(23,28)(24,25) 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.