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