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