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