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