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