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