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