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