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