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