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)(17,18)(19,21)(20,28)(22,24)(23,27)(25,30)(26,31)(29,32) involution — undirected(2,7)(3,10)(9,14)(11,16)(17,19)(18,23)(20,26)(21,24)(22,27)(25,31)(28,29)(30,32)(33,34,38,39)(35,41,43,37)(36,40,45,46)(42,47,48,44)(5,13)(9,14)(11,16)(12,15)(18,24)(21,23)(25,28)(29,31)(34,39)(37,41)(40,46)(44,47) involution — undirected(1,3)(2,8)(4,7)(5,11)(6,10)(9,15)(12,14)(13,16)(17,20,22,30)(18,25,24,28)(19,26,27,32)(21,29,23,31)(33,35)(34,37)(36,42)(38,43)(39,41)(40,44)(45,48)(46,47)(1,4,6,8)(2,3,7,10)(5,12,13,15)(9,11,14,16)(17,19)(18,23)(20,26)(21,24)(22,27)(25,31)(28,29)(30,32)(33,36,38,45)(34,40,39,46)(35,42,43,48)(37,44,41,47)(1,5,6,13)(2,9,7,14)(3,11,10,16)(4,12,8,15)(17,21,22,23)(18,19,24,27)(20,29,30,31)(25,26,28,32)(33,37)(34,35)(36,44)(38,41)(39,43)(40,42)(45,47)(46,48)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.