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