One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4)(5,12)(6,10)(7,16)(8,11)(9,13)(14,18)(15,17)(19,20,24,28)(21,25,31,38)(22,26,33,40)(23,34,35,27)(29,41,43,36)(30,44,45,37)(32,46,47,39)(42,48,50,49)(3,5)(4,9)(6,13)(7,14)(8,15)(10,17)(11,18)(12,16)(19,21)(20,25)(22,29)(23,30)(24,31)(26,36)(27,37)(28,38)(32,42)(33,43)(34,44)(35,45)(39,48)(40,41)(46,49)(47,50) involution — undirected(3,6,8,7)(4,10,11,16)(5,13,15,14)(9,17,18,12)(19,22)(20,26)(21,29)(23,32)(24,33)(25,36)(27,39)(28,40)(30,42)(31,43)(34,46)(35,47)(37,48)(38,41)(44,49)(45,50)(3,6,8,7)(4,10,11,16)(5,14,15,13)(9,12,18,17)(19,23,24,35)(20,27,28,34)(21,30,31,45)(22,32,33,47)(25,37,38,44)(26,39,40,46)(29,42,43,50)(36,48,41,49)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.