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