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