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