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