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