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