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