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