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