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