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