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