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