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