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