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