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