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