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