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