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