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