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