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