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