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