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