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