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)(19,23)(20,30)(21,25)(22,26)(24,27)(28,32)(29,31)(33,34,40,38)(35,44,45,41)(36,46,42,37)(39,43,47,48)(1,2)(3,6)(4,7)(5,8)(9,11)(10,14)(12,13)(15,16)(17,19,24,22)(18,23,27,26)(20,29,21,28)(25,32,30,31)(33,35,40,45)(34,41,38,44)(36,43,42,48)(37,47,46,39)(17,20,24,21)(18,25,27,30)(19,28,22,29)(23,31,26,32)(33,36)(34,37)(35,43)(38,46)(39,44)(40,42)(41,47)(45,48)(1,2)(3,6)(4,12)(5,8)(7,13)(9,11)(10,15)(14,16)(17,21,24,20)(18,25,27,30)(19,29,22,28)(23,31,26,32)(33,37,40,46)(34,42,38,36)(35,39,45,47)(41,43,44,48)(1,3,5,11)(2,6,8,9)(4,10,13,16)(7,14,12,15)(17,22,24,19)(18,26,27,23)(20,29,21,28)(25,32,30,31)(33,38,40,34)(35,44,45,41)(36,46,42,37)(39,48,47,43)(1,4)(2,7)(3,10)(5,13)(6,14)(8,12)(9,15)(11,16)(17,23,24,26)(18,19,27,22)(20,31,21,32)(25,28,30,29)(33,39)(34,43)(35,37)(36,44)(38,48)(40,47)(41,42)(45,46)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.