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