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)(15,16,20,22,19,24,18,23)(17,21,27,28,26,30,25,29)(3,4)(5,6)(7,9,11,13)(8,12,14,10)(15,17,19,26)(16,21,24,30)(18,25,20,27)(22,28,23,29)(4,6)(7,10,11,12)(8,13,14,9)(16,22)(18,20)(21,28)(23,24)(25,27)(29,30)(8,14)(9,13)(16,22)(18,20)(21,28)(23,24)(25,27)(29,30) 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.