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