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