One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4)(5,8)(6,7)(9,10)(11,12)(13,25)(14,19)(15,33)(16,36)(17,37)(18,24)(20,27)(21,26)(22,35)(23,34)(28,40)(29,39)(30,38)(31,42)(32,41) involution — undirected(4,7)(8,10)(11,13,26,32,17,29,35,30,18,27,16,28,34,31,15,14)(12,19,33,42,23,40,36,20,24,38,22,39,37,41,21,25)(3,5,6,9)(4,8,7,10)(11,14,15,31,34,28,16,27,18,30,35,29,17,32,26,13)(12,20,21,40,37,42,22,19,24,25,36,41,23,39,33,38)(13,27)(14,30)(19,38)(20,25)(28,32)(29,31)(39,42)(40,41) 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.