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