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