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