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