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