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