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