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