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)(17,18,22,24)(19,29,30,42)(20,33,34,26)(21,28,23,27)(25,37,38,32)(31,45,44,43)(35,40,36,41)(39,47,48,46)(1,3)(2,5)(4,7)(6,8)(9,11,14,10)(12,15,13,16)(18,24)(19,30)(20,34)(27,28)(32,37)(35,36)(39,48)(43,45)(3,7)(5,8)(9,12,14,13)(10,15,11,16)(17,19)(18,25)(20,31)(21,32)(22,30)(23,37)(24,38)(26,39)(27,29)(28,42)(33,48)(34,44)(35,46)(36,47)(40,45)(41,43)(2,6)(3,7)(9,13,14,12)(10,15,11,16)(17,20,22,34)(18,26,24,33)(19,31,30,44)(21,36,23,35)(25,39,38,48)(27,41,28,40)(29,43,42,45)(32,47,37,46)(3,7)(5,8)(10,11)(15,16)(17,21,22,23)(18,27,24,28)(19,32,30,37)(20,35,34,36)(25,29,38,42)(26,40,33,41)(31,46,44,47)(39,45,48,43)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.