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