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