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