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