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