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