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