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