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