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