One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(4,6)(7,8)(9,13)(10,12)(11,14)(15,16,18,21,19,22,25,28)(17,20,24,27,23,26,29,30)(7,9)(8,11)(10,14)(12,13)(15,17)(16,20)(18,24)(19,23)(21,27)(22,26)(25,29)(28,30) involution — undirected(3,4,5,6)(9,14)(11,13)(8,12)(11,13)(17,23)(20,26)(24,29)(27,30) 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.