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