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