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