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