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