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