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