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