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