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