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