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