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