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)(17,18,23,26)(19,24,22,32)(20,25,30,21)(27,28,29,31)(33,34,38,42)(35,43,44,39)(36,40,46,48)(37,41,45,47)(1,2)(3,6)(4,7)(5,8)(9,11)(10,14)(12,15)(13,16)(17,19,23,22)(18,24,26,32)(20,27,30,29)(21,31,25,28)(35,44)(37,45)(39,43)(41,47)(17,20,23,30)(18,21,26,25)(19,27,22,29)(24,31,32,28)(33,35,38,44)(34,39,42,43)(36,45,46,37)(40,41,48,47)(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,20)(18,25)(19,27)(21,26)(22,29)(23,30)(24,28)(31,32)(33,36,38,46)(34,40,42,48)(35,37,44,45)(39,47,43,41)(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(17,21,23,25)(18,20,26,30)(19,28,22,31)(24,29,32,27)(33,37)(34,41)(35,36)(38,45)(39,48)(40,43)(42,47)(44,46)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(17,22,23,19)(18,24,26,32)(20,29,30,27)(21,31,25,28)(33,34)(35,39)(36,40)(37,47)(38,42)(41,45)(43,44)(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.