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