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