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