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