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