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