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