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