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