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