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