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