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