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