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