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