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)(9,12)(10,11)(13,14)(15,16,21,26)(17,23,27,30)(18,22,28,29)(19,25,20,24)(8,11)(12,14)(15,17,19,18,21,27,20,28)(16,22,24,23,26,29,25,30)(7,9,10,13)(8,12,11,14)(15,18,19,27,21,28,20,17)(16,23,24,29,26,30,25,22)(4,6)(17,27)(18,28)(22,29)(23,30) 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.