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