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