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