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