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