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