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)(11,15)(12,16)(13,14)(20,27)(24,29)(25,31)(30,32)(34,38)(35,41)(36,44)(46,48)(10,14)(12,15)(18,22)(23,28)(24,29)(30,32)(33,34,37,38)(35,42,41,39)(36,45,44,40)(43,46,47,48)(9,11,13,16)(10,15,14,12)(17,18,21,22)(19,23,26,28)(20,24,27,29)(25,30,31,32)(33,34)(35,39)(36,45)(37,38)(40,44)(41,42)(43,48)(46,47)(1,2)(3,5)(4,6)(7,8)(9,12,13,15)(10,11,14,16)(17,19,21,26)(18,23,22,28)(20,25,27,31)(24,30,29,32)(33,35,37,41)(34,39,38,42)(36,43,44,47)(40,46,45,48)(1,3,4,7)(2,5,6,8)(9,11)(10,15)(12,14)(13,16)(17,20,21,27)(18,24,22,29)(19,25,26,31)(23,30,28,32)(33,36)(34,40)(35,43)(37,44)(38,45)(39,46)(41,47)(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.