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