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