One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6)(7,15)(8,12)(9,13)(10,14)(11,17)(16,20)(18,19)(21,22,25,29)(23,31,33,27)(24,35,37,51)(26,39,36,30)(28,42,43,38)(32,46,48,50)(34,41,47,45)(40,49,44,52)(1,2,4,3)(7,16)(8,9)(11,19)(12,13)(15,20)(17,18)(21,23,25,33)(22,27,29,31)(24,32,37,48)(26,34,36,47)(28,40,43,44)(30,41,39,45)(35,50,51,46)(38,49,42,52)(5,7,9,16,10,18,8,17)(6,11,12,19,14,20,13,15)(21,24,36,42,25,37,26,38)(22,28,39,51,29,43,30,35)(23,32,47,52,33,48,34,49)(27,40,45,46,31,44,41,50)(1,3,4,2)(5,8,10,9)(6,12,14,13)(7,17,18,16)(11,19,20,15)(22,29)(23,33)(24,37)(30,39)(34,47)(38,42)(40,44)(46,50)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.