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