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