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