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