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