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)(21,29)(24,31)(27,28)(30,32)(34,39)(35,37)(36,44)(47,48) involution — undirected(1,3,7,5)(2,4,8,12)(6,10,15,13)(9,11,14,16)(17,18)(19,26)(20,23)(21,24)(22,25)(27,32)(28,30)(29,31)(33,34,38,39)(35,40,37,42)(36,41,44,46)(43,47,45,48)(2,8)(3,5)(9,14)(10,13)(17,19,22,20)(18,23,25,26)(21,27,29,28)(24,30,31,32)(33,35,38,37)(34,40,39,42)(36,45,44,43)(41,48,46,47)(1,4)(2,3)(5,8)(6,11)(7,12)(9,10)(13,14)(15,16)(17,20,22,19)(18,23,25,26)(21,28,29,27)(24,30,31,32)(33,34)(35,40)(36,41)(37,42)(38,39)(43,47)(44,46)(45,48)(1,5,7,3)(2,4,8,12)(6,13,15,10)(9,11,14,16)(17,18)(19,26)(20,23)(21,24)(22,25)(27,32)(28,30)(29,31)(33,36,38,44)(34,41,39,46)(35,43,37,45)(40,47,42,48)(1,6)(2,9)(3,10)(4,11)(5,13)(7,15)(8,14)(12,16)(17,21)(18,24)(19,27)(20,28)(22,29)(23,30)(25,31)(26,32)(33,37,38,35)(34,42,39,40)(36,45,44,43)(41,48,46,47)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.