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