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