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