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