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