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