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)(11,15)(12,16)(13,14)(17,18,24,30)(19,31,35,42)(20,36,37,45)(21,27,39,46)(22,29,23,28)(25,34,43,33)(26,38,44,32)(40,48,41,47)(1,3,5,4)(2,6,8,7)(9,10)(11,16)(12,15)(13,14)(17,19,23,34,24,35,22,33)(18,25,29,42,30,43,28,31)(20,21,32,41,37,39,38,40)(26,27,36,48,44,46,45,47)(1,3,5,4)(2,7,8,6)(10,14)(15,16)(17,20,23,32,24,37,22,38)(18,26,29,36,30,44,28,45)(19,21,34,41,35,39,33,40)(25,27,42,48,43,46,31,47)(9,11,13,12)(10,15,14,16)(17,21)(18,27)(19,32)(20,33)(22,40)(23,41)(24,39)(25,36)(26,31)(28,47)(29,48)(30,46)(34,37)(35,38)(42,44)(43,45)(1,4,5,3)(2,6,8,7)(9,12,13,11)(10,15,14,16)(20,37)(21,39)(26,44)(27,46)(32,38)(36,45)(40,41)(47,48)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.