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)(17,18,23,27)(19,24,28,31)(20,25,29,30)(21,22,26,32)(33,34,39,42)(35,40,37,41)(36,45,47,38)(43,44,46,48)(2,7)(3,12)(9,13)(10,16)(17,19,23,28)(18,24,27,31)(20,21,29,26)(22,30,32,25)(33,34)(35,40)(36,38)(37,41)(39,42)(43,48)(44,46)(45,47)(2,7)(3,12)(9,13)(10,16)(19,28)(20,29)(24,31)(25,30)(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)(17,20,23,29)(18,25,27,30)(19,21,28,26)(22,31,32,24)(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)(17,21)(18,22)(19,29)(20,28)(23,26)(24,30)(25,31)(27,32)(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)(17,22)(18,26)(19,30)(20,24)(21,27)(23,32)(25,28)(29,31)(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.