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