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