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