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