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)(9,14)(13,18)(15,17)(19,20,24,28,25,29,23,38)(21,26,32,40,33,41,31,47)(22,34,37,42,35,48,36,27)(30,43,46,49,44,50,45,39)(3,5)(4,9)(6,15)(7,13)(8,14)(10,18)(11,12)(16,17)(19,21,24,32,25,33,23,31)(20,26,28,40,29,41,38,47)(22,30,37,46,35,44,36,45)(27,39,34,43,42,49,48,50)(3,6,8,7)(4,10,11,16)(5,13,14,15)(9,17,12,18)(19,22,23,36,25,35,24,37)(20,27,28,34,29,42,38,48)(21,30,31,45,33,44,32,46)(26,39,40,43,41,49,47,50)(3,7,8,6)(4,10,11,16)(5,13,14,15)(9,18,12,17)(22,35)(27,42)(30,44)(34,48)(36,37)(39,49)(43,50)(45,46)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.