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