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