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