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