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