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