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