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