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