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