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