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