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