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