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