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)(19,30,34,46)(20,35,21,26)(22,28,23,27)(25,39,42,33)(31,47,36,41)(32,40,48,43)(37,44,38,45)(1,3,5,4)(2,6,7,8)(9,10)(11,15)(12,14)(13,16)(17,19)(18,25)(20,36)(21,31)(22,33)(23,39)(24,34)(26,43)(27,30)(28,46)(29,42)(32,38)(35,40)(37,48)(41,44)(45,47)(2,7)(6,8)(9,11,12,16)(10,13,14,15)(17,20)(18,26)(19,31)(21,24)(22,38)(23,37)(25,40)(27,45)(28,44)(29,35)(30,41)(32,39)(33,48)(34,36)(42,43)(46,47)(11,16)(13,15)(17,21,24,20)(18,26,29,35)(19,32,34,48)(22,38,23,37)(25,41,42,47)(27,44,28,45)(30,40,46,43)(31,33,36,39)(1,4,5,3)(2,8,7,6)(10,14)(13,15)(17,22,24,23)(18,27,29,28)(19,33,34,39)(20,37,21,38)(25,30,42,46)(26,44,35,45)(31,32,36,48)(40,47,43,41)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.