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