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