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