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