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