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