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