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