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