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