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