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