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