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