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