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