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