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