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