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