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