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