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