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