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