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