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