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