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