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