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