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