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