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