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