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