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