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