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