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